Wrench.



D. W. NULL.

WRENCH.

APPLICATION FILED MAY'3, 1915.

1,152,832. Patented Sept. 7, 1915.

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COLUMBIA PLANUGRAPH c0., WASHINGTON. n. c.

DAVID WALTER NULL, OF NED, PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Patented Sept. 7,1915.

Application filed May 3, 1915. Serial No. 25,405.

To all whom it may concern:

Be it known that I, DAVID W. NULL, a citizen of the United States ofAmerica, and resident of Ned, county of Greene, and State ofPennsylvania, have invented certain new and useful Improvements inTrenches, of which the following is a specification.

This invention relates broadly to wrenches of the quickly adjustabletype, and specifically to novel and improved wrench of said type.

The object of the invention is to provide a wrench of that class havinga toothed handle or shank and a rotatable worm associated with a movablejaw whereby adjustment of the latter is effected, said wrench havingmeans whereby said worm may be bodily dissociated from said shank topermit of a rapid shifting movement of said jaw.

The invention resides in the features of construction, arrangement ofparts and combinations of elements which will hereinafter be fullydescribed, reference being had to the accompanying drawings, forming apart of this specification, in which Figure 1 is a side elevation of theinvention; Fig. 2 is a longitudinal sectional view; and Fig. 3 is across section on the line 33,

Fig. 1.

Referring to said drawings, in which like designating charactersdistinguish like parts throughout the several views1 indicates a wrenchhandle or shank having a fixed jaw 2 and provided with teeth 3 along oneedge thereof, said parts being of a common construction. Mounted tocooperate with the fixed jaw 2 is a movable jaw 41 having an integralsleeve portion 5 loosely embracing and slidable upon the shank 1. Anextension 5 is formed by extending the sleeve rearward a considerabledistance from the jaw 41, said extension embracing said shank exceptalong a portion of the edge on which the teeth are located. Provided inthe outer face of each of the opposite side portions of said extensionare two parallel transverse grooves 7 in which are mounted the parallelarm 8 of a yoke 9, said arms being located to constitute two oppositelydisposed pairs. The back portion of said yoke rests upon a yieldableelement, as a spring 10 of bowed form which has one end rigidly attachedto the sleeve. Fitted between the extremities of the arms 8 constitutingeach pair is a bearing piece 11, said bearing pieces being secured tosaid arms by transversely directed pins or rivets 12. Mounted in saidbearing pieces are the opposite ends of a spindle 13 upon which, betweensaid bearing pieces, a worm 14 is rotatably mounted.

The spring 10 normally maintains the yoke 9 in a position wherein thethreads of the worm are disposed in operative relation to the teeth ofthe shank, so that by rotation of said worm the movable jaw 4: may beadjusted with respect to the fixed aw 2. How

ever, by the application of pressure to the back portion of the yoke, aswith the thumb of the hand which holds the shank, said yoke is forceddownward, the arms 8 sliding in the grooves 7, and the threads of theworm are thus disengaged from the teeth, whereupon said movable jaw maybe freely moved forward or back to the desired point of adjustment. Thesleeve extension 5 has a rear end shank-encircling portion 5" againstwhich the rearmost bearing piece 11 abuts, as shown in Fig. 2, and saidportion 5 is provided'with an open slot 15 in its lower end, said slotpermitting free vertical move ment of the rearwardly-extending end ofthe spindle 13. When the applied yoke-depressing pressure is removedfrom the back portion of the yoke, the spring 10 actuates the latter toresume its normal position, returning the worm to a position inoperative relation to the teeth of the shank.

lVhat is claimed is 1. In a wrench, a shank having a fixed jaw andteeth, a movable jaw on the shank, a sleeve connected to the movable jawand extending beyond the latter and having an opening in register withthe teeth, said sleeve having a pair of spaced transverse grooves oneach side thereof and extending thereacross, a yoke having a pair ofparallel arms at each end thereof which arms are received in'therespective grooves, a pair of bearings connected to the free ends of thearms, one of said bearings being disposed adjacent the inner end of themovable jaw, a shank encircling member on the inner end of the sleeveagainst which the other bearing abuts. a worm carrying spindle journaledin said bearings, said member being slotted and said shank extendingbeyond its inner bearing and into said slot, and a spring on the sleeveand bearing against the yoke.

2. In a wrench, a shank having a fixed jaw and teeth, a movable jaw onthe shank, a sleeve connected to the movable jaw and extending beyondthe latter and having an opening in register with the teeth, said sleevehaving a pair of spaced transverse grooves on each side thereof andextending thereacross, a yoke having a pair of parallel arms at each endthereof which arms are received in the respective grooves, a pair ofbearings received in the space between the free ends of the arms of therespective pairs thereof, pins extending transversely through the armsand bearings, one of said bearings being disposed adjacent the inner endof the movable jaw, a shank encircling member on the inner end of thesleeve against which the other bearing abuts, a worm carrying spindlejournaled in said bearings, said member being slotted and said shankextending be yond its inner bearing and into said slot, and a spring onthe sleeve and bearing against the yoke.

In testimony whereof, I affix my signature in presence of twosubscribing witnesses.

DAVID WALTER NULL. W'Vitnesses:

D. L. HAUGHT, J 0s. H. SACHER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

